Suction Line Length/Size versus Capacity Multiplier (R-410A)
Suction Line Run—
Feet [m]
Optional
Standard
Optional
Optional
Standard
Optional
Optional
Standard
Optional
Optional
Standard
Optional
5 Ton4 Ton3
1
/2 Ton3 Ton1
1
/2 TonUnit Size
3
/4" [19.05 mm] O.D. Opt.
7
/8" [22.23 mm] O.D. Std.*
7
/8" [22.23 mm] O.D. Opt.
1
1
/8" [28.58 mm] O.D. Std.*
25' [7.62]
1.00
1.00
—
1.00
1.00
—
1.00
1.00
—
1.00
1.00
—
1.00
1.00
—
50' [15.24]
0.98
0.99
—
0.98
0.99
—
0.99
0.99
—
0.99
0.99
—
0.99
0.99
—
100' [30.48]
0.95
0.96
—
0.96
0.97
—
0.96
0.98
—
0.96
0.98
—
0.97
0.98
—
150' [45.72]
0.92
0.93
—
0.94
0.95
—
0.94
0.96
—
0.95
0.96
—
0.94
0.97
—
2
1
/2 Ton
1.00
1.00
1.00
0.96
0.98
0.99
0.94
0.96
0.97
0.91
0.93
0.95
3/4" [19.05] I.D.
Suction Line
Connection Size
5
/8" [15.88 mm] O.D. Opt.
3
/4" [19.05 mm] O.D. Std.*
2 Ton
1.00
1.00
—
0.98
0.99
—
0.95
0.96
—
0.92
0.94
—
5
/8" [15.88 mm] O.D. Opt.
3
/4" [19.05 mm] O.D. Std.*
7
/8" [22.23 mm] O.D. Opt.
7/8" [22.23] I.D.
System
Capacity
Line Size
Connection
Size
(Inch I.D.)
[mm]
Liquid Line Sizing (R410A)
Outdoor Unit Above or Below Indoor Coil (Heat Pumps Only)
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.10] 150 [45.72]
Total Equivalent Length—Feet [m]
Maximum Vertical Separation—Feet [m]
25 [7.62] 50 [15.24] 75 [22.86]
25 [7.62] 50 [15.24] 62 [18.90]
72 [21.95]
58 [17.68] 53 [16.15] 49 [14.94]
70 [21.34] 68 [20.73]
1
1
/2 Ton
3/8"
[9.53]
25 [7.62] 40 [12.19] 25 [7.62] 9 [2.74] N/A N/A
25 [7.62] 50 [15.24] 68 [20.73]
25 [7.62] 49 [14.94] 38 [11.58]
65 [19.81]
27 [8.23] 17 [5.18] 6 [1.83]
62 [18.90] 58 [17.68]
2
1
/2 Ton
3/8"
[9.53]
25 [7.62] N/A N/A N/A N/A N/A
3 Ton
3/8"
[9.53]
25 [7.62] 50 [15.24] 37 [11.28] 22 [6.71] 7 [2.13] N/A
25 [7.62] 50 [15.24] 68 [20.73] 63 [19.20] 58 [17.68] 53 [16.15]
3
1
/2 Ton
3/8"
[9.53]
25 [7.62] 23 [7.01] 4 [1.22] N/A N/A N/A
25 [7.62] 50 [15.24] 43 [13.11] 36 [10.97] 30 [9.14] 24 [7.32]
4 Ton
3/8"
[9.53]
25 [7.62] 46 [14.02] 38 [11.58] 30 [9.14] 22 [6.71] 15 [4.57]
25 [7.62] 50 [15.24] 56 [17.07] 55 [16.76] 53 [16.15] 52 [15.85]
5 Ton
3/8"
[9.53]
25 [7.62] 50 [15.24] 56 [17.07] 44 [13.41] 32 [9.75] 20 [6.10]
25 [7.62] 50 [15.24] 75 [22.86] 81 [24.69] 79 [24.08] 76 [23.16]
3/8* [9.53]
5/16 [7.94]
1/4 [6.35]
3/8* [9.53]
5/16 [7.94]
1/4 [6.35]
5/16 [7.94]
3/8* [9.53]
5/16 [7.94]
3/8* [9.53]
3/8* [9.53]
1/2 [12.7]
3/8* [9.53]
1/2 [12.7]
Line Size
(Inch O.D.)
[mm]
25 [7.62] 50 [15.24] 72 [21.95]
25 [7.62] 36 [10.97] 29 [8.84]
70 [21.34]
23 [7.01] 16 [4.88] 9 [2.74]
68 [20.73] 65 [19.81]3/8* [9.53]
5/16 [7.94]
2 Ton
3/8"
[9.53]
23 [7.01] N/A N/A N/A N/A N/A1/4 [6.35]
NOTES:
*Standard line size
N/A = Application not recommended.
NOTES: [ ] Designates Metric Conversions
*Standard line size
N/A = Using suction line larger than shown in chart will result in poor oil return and is not recommended.
Heat Pump Refrigerant Line Size Information
(12 paginas)
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